fix: Restore all files lost during destructive rebase

A previous `git pull --rebase origin main` dropped 177 local commits,
losing 3400+ files across admin-v2, backend, studio-v2, website,
klausur-service, and many other services. The partial restore attempt
(660295e2) only recovered some files.

This commit restores all missing files from pre-rebase ref 98933f5e
while preserving post-rebase additions (night-scheduler, night-mode UI,
NightModeWidget dashboard integration).

Restored features include:
- AI Module Sidebar (FAB), OCR Labeling, OCR Compare
- GPU Dashboard, RAG Pipeline, Magic Help
- Klausur-Korrektur (8 files), Abitur-Archiv (5+ files)
- Companion, Zeugnisse-Crawler, Screen Flow
- Full backend, studio-v2, website, klausur-service
- All compliance SDKs, agent-core, voice-service
- CI/CD configs, documentation, scripts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

website/app/lehrer/abitur-archiv/page.tsx

@@ -0,0 +1,504 @@
+'use client'
+
+/**
+ * Abitur-Archiv - Lehrer Version
+ * Simplified archive view for teachers
+ */
+
+import { useState, useEffect, useCallback } from 'react'
+import Link from 'next/link'
+import {
+  FileText, Filter, ChevronLeft, ChevronRight, Eye, Download, Search,
+  X, Loader2, Grid, List, LayoutGrid, Plus, Archive, BookOpen
+} from 'lucide-react'
+
+// API Base URL
+const API_BASE = '/api/education/abitur-archiv'
+
+// Filter constants
+const FAECHER = [
+  { id: 'deutsch', label: 'Deutsch' },
+  { id: 'englisch', label: 'Englisch' },
+  { id: 'mathematik', label: 'Mathematik' },
+  { id: 'biologie', label: 'Biologie' },
+  { id: 'physik', label: 'Physik' },
+  { id: 'chemie', label: 'Chemie' },
+  { id: 'geschichte', label: 'Geschichte' },
+]
+
+const JAHRE = [2025, 2024, 2023, 2022, 2021]
+
+const NIVEAUS = [
+  { id: 'eA', label: 'Erhoehtes Niveau (eA)' },
+  { id: 'gA', label: 'Grundlegendes Niveau (gA)' },
+]
+
+const TYPEN = [
+  { id: 'aufgabe', label: 'Aufgabe' },
+  { id: 'erwartungshorizont', label: 'Erwartungshorizont' },
+]
+
+interface AbiturDokument {
+  id: string
+  dateiname: string
+  fach: string
+  jahr: number
+  niveau: 'eA' | 'gA'
+  typ: 'aufgabe' | 'erwartungshorizont'
+  aufgaben_nummer: string
+  status: string
+  file_path: string
+  file_size: number
+}
+
+export default function AbiturArchivPage() {
+  const [documents, setDocuments] = useState<AbiturDokument[]>([])
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+
+  // Pagination
+  const [page, setPage] = useState(1)
+  const [totalPages, setTotalPages] = useState(1)
+  const [total, setTotal] = useState(0)
+  const limit = 20
+
+  // View mode
+  const [viewMode, setViewMode] = useState<'grid' | 'list'>('grid')
+
+  // Filters
+  const [filterOpen, setFilterOpen] = useState(false)
+  const [filterFach, setFilterFach] = useState('')
+  const [filterJahr, setFilterJahr] = useState('')
+  const [filterNiveau, setFilterNiveau] = useState('')
+  const [filterTyp, setFilterTyp] = useState('')
+  const [searchQuery, setSearchQuery] = useState('')
+
+  // Preview modal
+  const [previewDoc, setPreviewDoc] = useState<AbiturDokument | null>(null)
+
+  const fetchDocuments = useCallback(async () => {
+    setLoading(true)
+    setError(null)
+
+    const params = new URLSearchParams()
+    params.set('page', page.toString())
+    params.set('limit', limit.toString())
+    if (filterFach) params.set('fach', filterFach)
+    if (filterJahr) params.set('jahr', filterJahr)
+    if (filterNiveau) params.set('niveau', filterNiveau)
+    if (filterTyp) params.set('typ', filterTyp)
+    if (searchQuery) params.set('thema', searchQuery)
+
+    try {
+      // Try the admin-v2 API first
+      const response = await fetch(`${API_BASE}?${params.toString()}`)
+      if (!response.ok) throw new Error('Fehler beim Laden')
+
+      const data = await response.json()
+      setDocuments(data.documents || [])
+      setTotalPages(data.total_pages || 1)
+      setTotal(data.total || 0)
+    } catch (err) {
+      // Fallback: use mock data
+      setDocuments(getMockDocuments())
+      setTotal(getMockDocuments().length)
+      setTotalPages(1)
+    } finally {
+      setLoading(false)
+    }
+  }, [page, filterFach, filterJahr, filterNiveau, filterTyp, searchQuery])
+
+  useEffect(() => {
+    fetchDocuments()
+  }, [fetchDocuments])
+
+  const clearFilters = () => {
+    setFilterFach('')
+    setFilterJahr('')
+    setFilterNiveau('')
+    setFilterTyp('')
+    setSearchQuery('')
+    setPage(1)
+  }
+
+  const handleSearch = (e: React.FormEvent) => {
+    e.preventDefault()
+    setPage(1)
+    fetchDocuments()
+  }
+
+  const handleDownload = (doc: AbiturDokument) => {
+    const link = document.createElement('a')
+    link.href = doc.file_path
+    link.download = doc.dateiname
+    link.click()
+  }
+
+  const handleAddToKlausur = (doc: AbiturDokument) => {
+    window.location.href = `/lehrer/klausur-korrektur?archiv_doc_id=${doc.id}`
+  }
+
+  const hasActiveFilters = filterFach || filterJahr || filterNiveau || filterTyp || searchQuery
+
+  const formatFileSize = (bytes: number) => {
+    if (bytes < 1024) return bytes + ' B'
+    if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB'
+    return (bytes / (1024 * 1024)).toFixed(1) + ' MB'
+  }
+
+  return (
+    <div className="space-y-6">
+      {/* Header */}
+      <div className="flex items-center justify-between">
+        <div className="flex items-center gap-3">
+          <div className="w-12 h-12 bg-gradient-to-br from-purple-500 to-purple-700 rounded-xl flex items-center justify-center">
+            <Archive className="w-6 h-6 text-white" />
+          </div>
+          <div>
+            <h1 className="text-2xl font-bold text-slate-900">Abitur-Archiv</h1>
+            <p className="text-sm text-slate-500">Zentralabitur-Materialien 2021-2025</p>
+          </div>
+        </div>
+        <div className="text-right">
+          <div className="text-2xl font-bold text-slate-800">{total}</div>
+          <div className="text-sm text-slate-500">Dokumente</div>
+        </div>
+      </div>
+
+      {/* Search Bar */}
+      <div className="bg-white rounded-xl border border-slate-200 p-4">
+        <form onSubmit={handleSearch} className="flex gap-3">
+          <div className="relative flex-1">
+            <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-slate-400" />
+            <input
+              type="text"
+              value={searchQuery}
+              onChange={(e) => setSearchQuery(e.target.value)}
+              placeholder="Thema suchen (z.B. Gedichtanalyse, Eroerterung...)"
+              className="w-full pl-10 pr-4 py-2.5 border border-slate-300 rounded-lg focus:ring-2 focus:ring-blue-500"
+            />
+          </div>
+          <button
+            type="submit"
+            className="px-6 py-2.5 bg-blue-600 text-white rounded-lg hover:bg-blue-700"
+          >
+            Suchen
+          </button>
+        </form>
+      </div>
+
+      {/* Filters */}
+      <div className="bg-white rounded-xl border border-slate-200 p-4">
+        <div className="flex items-center justify-between mb-4">
+          <div className="flex items-center gap-3">
+            <button
+              onClick={() => setFilterOpen(!filterOpen)}
+              className={`px-4 py-2 rounded-lg font-medium flex items-center gap-2 transition-colors ${
+                filterOpen || hasActiveFilters
+                  ? 'bg-purple-100 text-purple-700'
+                  : 'bg-slate-100 text-slate-600 hover:bg-slate-200'
+              }`}
+            >
+              <Filter className="w-4 h-4" />
+              Filter
+              {hasActiveFilters && (
+                <span className="bg-purple-600 text-white text-xs px-1.5 py-0.5 rounded-full">
+                  {[filterFach, filterJahr, filterNiveau, filterTyp].filter(Boolean).length}
+                </span>
+              )}
+            </button>
+
+            {hasActiveFilters && (
+              <button
+                onClick={clearFilters}
+                className="text-sm text-slate-500 hover:text-slate-700 flex items-center gap-1"
+              >
+                <X className="w-4 h-4" />
+                Zuruecksetzen
+              </button>
+            )}
+          </div>
+
+          <div className="flex items-center gap-3">
+            <span className="text-sm text-slate-500">{total} Treffer</span>
+            <div className="flex bg-slate-100 rounded-lg p-1">
+              <button
+                onClick={() => setViewMode('grid')}
+                className={`p-2 rounded-md ${viewMode === 'grid' ? 'bg-white shadow-sm' : ''}`}
+              >
+                <LayoutGrid className="w-4 h-4" />
+              </button>
+              <button
+                onClick={() => setViewMode('list')}
+                className={`p-2 rounded-md ${viewMode === 'list' ? 'bg-white shadow-sm' : ''}`}
+              >
+                <List className="w-4 h-4" />
+              </button>
+            </div>
+          </div>
+        </div>
+
+        {filterOpen && (
+          <div className="grid grid-cols-2 md:grid-cols-4 gap-3 pt-4 border-t border-slate-200">
+            <select
+              value={filterFach}
+              onChange={(e) => { setFilterFach(e.target.value); setPage(1) }}
+              className="px-3 py-2 border border-slate-300 rounded-lg text-sm"
+            >
+              <option value="">Alle Faecher</option>
+              {FAECHER.map(f => <option key={f.id} value={f.id}>{f.label}</option>)}
+            </select>
+            <select
+              value={filterJahr}
+              onChange={(e) => { setFilterJahr(e.target.value); setPage(1) }}
+              className="px-3 py-2 border border-slate-300 rounded-lg text-sm"
+            >
+              <option value="">Alle Jahre</option>
+              {JAHRE.map(j => <option key={j} value={j}>{j}</option>)}
+            </select>
+            <select
+              value={filterNiveau}
+              onChange={(e) => { setFilterNiveau(e.target.value); setPage(1) }}
+              className="px-3 py-2 border border-slate-300 rounded-lg text-sm"
+            >
+              <option value="">Alle Niveaus</option>
+              {NIVEAUS.map(n => <option key={n.id} value={n.id}>{n.label}</option>)}
+            </select>
+            <select
+              value={filterTyp}
+              onChange={(e) => { setFilterTyp(e.target.value); setPage(1) }}
+              className="px-3 py-2 border border-slate-300 rounded-lg text-sm"
+            >
+              <option value="">Alle Typen</option>
+              {TYPEN.map(t => <option key={t.id} value={t.id}>{t.label}</option>)}
+            </select>
+          </div>
+        )}
+      </div>
+
+      {/* Documents */}
+      <div className="bg-white rounded-xl border border-slate-200 overflow-hidden">
+        {loading ? (
+          <div className="flex items-center justify-center py-16">
+            <Loader2 className="w-8 h-8 text-blue-600 animate-spin" />
+          </div>
+        ) : documents.length === 0 ? (
+          <div className="text-center py-16 text-slate-500">
+            <FileText className="w-12 h-12 mx-auto mb-3 opacity-50" />
+            <p>Keine Dokumente gefunden</p>
+          </div>
+        ) : viewMode === 'grid' ? (
+          <div className="p-4 grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4">
+            {documents.map((doc) => {
+              const fachLabel = FAECHER.find(f => f.id === doc.fach)?.label || doc.fach
+              return (
+                <div
+                  key={doc.id}
+                  className="bg-white rounded-xl border border-slate-200 overflow-hidden hover:shadow-lg transition-all cursor-pointer group"
+                  onClick={() => setPreviewDoc(doc)}
+                >
+                  <div className="relative h-32 bg-gradient-to-br from-slate-100 to-slate-50 flex items-center justify-center">
+                    <FileText className="w-16 h-16 text-slate-300 group-hover:text-blue-400" />
+                    <span className={`absolute top-3 left-3 px-2.5 py-1 rounded-full text-xs font-medium ${
+                      doc.typ === 'erwartungshorizont'
+                        ? 'bg-orange-100 text-orange-700'
+                        : 'bg-purple-100 text-purple-700'
+                    }`}>
+                      {doc.typ === 'erwartungshorizont' ? 'EWH' : 'Aufgabe'}
+                    </span>
+                    <span className="absolute top-3 right-3 px-2 py-1 bg-white/80 rounded-lg text-xs font-semibold">
+                      {doc.jahr}
+                    </span>
+                  </div>
+                  <div className="p-4">
+                    <h3 className="font-semibold text-slate-800 mb-2">
+                      {fachLabel} {doc.niveau} - {doc.aufgaben_nummer}
+                    </h3>
+                    <div className="text-sm text-slate-500 mb-3">{doc.dateiname}</div>
+                    <div className="flex gap-2">
+                      <button
+                        onClick={(e) => { e.stopPropagation(); setPreviewDoc(doc) }}
+                        className="flex-1 px-3 py-2 bg-blue-50 text-blue-700 rounded-lg hover:bg-blue-100 text-sm font-medium flex items-center justify-center gap-1.5"
+                      >
+                        <Eye className="w-4 h-4" />
+                        Vorschau
+                      </button>
+                      <button
+                        onClick={(e) => { e.stopPropagation(); handleDownload(doc) }}
+                        className="px-3 py-2 text-slate-600 hover:bg-slate-100 rounded-lg"
+                      >
+                        <Download className="w-4 h-4" />
+                      </button>
+                      <button
+                        onClick={(e) => { e.stopPropagation(); handleAddToKlausur(doc) }}
+                        className="px-3 py-2 text-green-600 hover:bg-green-50 rounded-lg"
+                      >
+                        <Plus className="w-4 h-4" />
+                      </button>
+                    </div>
+                  </div>
+                </div>
+              )
+            })}
+          </div>
+        ) : (
+          <table className="w-full text-sm">
+            <thead className="bg-slate-50 border-b border-slate-200">
+              <tr>
+                <th className="text-left px-4 py-3 font-medium text-slate-600">Dokument</th>
+                <th className="text-left px-4 py-3 font-medium text-slate-600">Fach</th>
+                <th className="text-center px-4 py-3 font-medium text-slate-600">Jahr</th>
+                <th className="text-center px-4 py-3 font-medium text-slate-600">Niveau</th>
+                <th className="text-center px-4 py-3 font-medium text-slate-600">Typ</th>
+                <th className="text-center px-4 py-3 font-medium text-slate-600">Aktion</th>
+              </tr>
+            </thead>
+            <tbody>
+              {documents.map((doc) => {
+                const fachLabel = FAECHER.find(f => f.id === doc.fach)?.label || doc.fach
+                return (
+                  <tr key={doc.id} className="border-b border-slate-100 hover:bg-slate-50">
+                    <td className="px-4 py-3">
+                      <div className="flex items-center gap-2">
+                        <FileText className="w-4 h-4 text-red-500" />
+                        <span className="font-medium">{doc.dateiname}</span>
+                      </div>
+                    </td>
+                    <td className="px-4 py-3">{fachLabel}</td>
+                    <td className="px-4 py-3 text-center">{doc.jahr}</td>
+                    <td className="px-4 py-3 text-center">
+                      <span className={`px-2 py-0.5 rounded-full text-xs ${
+                        doc.niveau === 'eA' ? 'bg-blue-100 text-blue-700' : 'bg-slate-100 text-slate-700'
+                      }`}>
+                        {doc.niveau}
+                      </span>
+                    </td>
+                    <td className="px-4 py-3 text-center">
+                      <span className={`px-2 py-0.5 rounded-full text-xs ${
+                        doc.typ === 'erwartungshorizont' ? 'bg-orange-100 text-orange-700' : 'bg-purple-100 text-purple-700'
+                      }`}>
+                        {doc.typ === 'erwartungshorizont' ? 'EWH' : 'Aufgabe'}
+                      </span>
+                    </td>
+                    <td className="px-4 py-3 text-center">
+                      <div className="flex items-center justify-center gap-1">
+                        <button onClick={() => setPreviewDoc(doc)} className="p-1.5 text-blue-600 hover:bg-blue-50 rounded">
+                          <Eye className="w-4 h-4" />
+                        </button>
+                        <button onClick={() => handleDownload(doc)} className="p-1.5 text-slate-600 hover:bg-slate-100 rounded">
+                          <Download className="w-4 h-4" />
+                        </button>
+                        <button onClick={() => handleAddToKlausur(doc)} className="p-1.5 text-green-600 hover:bg-green-50 rounded">
+                          <Plus className="w-4 h-4" />
+                        </button>
+                      </div>
+                    </td>
+                  </tr>
+                )
+              })}
+            </tbody>
+          </table>
+        )}
+
+        {/* Pagination */}
+        {documents.length > 0 && (
+          <div className="flex items-center justify-between px-4 py-3 border-t border-slate-200 bg-slate-50">
+            <div className="text-sm text-slate-500">
+              Seite {page} von {totalPages}
+            </div>
+            <div className="flex items-center gap-2">
+              <button
+                onClick={() => setPage(p => Math.max(1, p - 1))}
+                disabled={page === 1}
+                className="p-2 rounded-lg hover:bg-slate-200 disabled:opacity-50"
+              >
+                <ChevronLeft className="w-4 h-4" />
+              </button>
+              <button
+                onClick={() => setPage(p => Math.min(totalPages, p + 1))}
+                disabled={page === totalPages}
+                className="p-2 rounded-lg hover:bg-slate-200 disabled:opacity-50"
+              >
+                <ChevronRight className="w-4 h-4" />
+              </button>
+            </div>
+          </div>
+        )}
+      </div>
+
+      {/* Preview Modal */}
+      {previewDoc && (
+        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60">
+          <div className="bg-white rounded-2xl shadow-2xl w-[90vw] h-[85vh] max-w-5xl flex flex-col">
+            <div className="flex items-center justify-between px-4 py-3 border-b border-slate-200">
+              <h2 className="font-semibold text-slate-900">{previewDoc.dateiname}</h2>
+              <div className="flex items-center gap-2">
+                <button
+                  onClick={() => handleDownload(previewDoc)}
+                  className="px-3 py-1.5 text-sm bg-blue-100 text-blue-700 rounded-lg hover:bg-blue-200 flex items-center gap-1.5"
+                >
+                  <Download className="w-4 h-4" />
+                  Download
+                </button>
+                <button
+                  onClick={() => handleAddToKlausur(previewDoc)}
+                  className="px-3 py-1.5 text-sm bg-green-100 text-green-700 rounded-lg hover:bg-green-200 flex items-center gap-1.5"
+                >
+                  <Plus className="w-4 h-4" />
+                  Zur Klausur
+                </button>
+                <button
+                  onClick={() => setPreviewDoc(null)}
+                  className="p-2 hover:bg-slate-100 rounded-lg"
+                >
+                  <X className="w-5 h-5 text-slate-500" />
+                </button>
+              </div>
+            </div>
+            <div className="flex-1 bg-slate-100 p-4">
+              <iframe
+                src={previewDoc.file_path}
+                className="w-full h-full rounded-lg border border-slate-200 bg-white"
+                title={previewDoc.dateiname}
+              />
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  )
+}
+
+function getMockDocuments(): AbiturDokument[] {
+  const docs: AbiturDokument[] = []
+  const faecher = ['deutsch', 'englisch']
+  const jahre = [2024, 2023, 2022]
+  const niveaus: Array<'eA' | 'gA'> = ['eA', 'gA']
+  const typen: Array<'aufgabe' | 'erwartungshorizont'> = ['aufgabe', 'erwartungshorizont']
+  const nummern = ['I', 'II', 'III']
+
+  let id = 1
+  for (const jahr of jahre) {
+    for (const fach of faecher) {
+      for (const niveau of niveaus) {
+        for (const nummer of nummern) {
+          for (const typ of typen) {
+            docs.push({
+              id: `doc-${id++}`,
+              dateiname: `${jahr}_${fach}_${niveau}_${nummer}${typ === 'erwartungshorizont' ? '_EWH' : ''}.pdf`,
+              fach,
+              jahr,
+              niveau,
+              typ,
+              aufgaben_nummer: nummer,
+              status: 'indexed',
+              file_path: '#',
+              file_size: 250000 + Math.random() * 500000
+            })
+          }
+        }
+      }
+    }
+  }
+  return docs
+}